The existence of latent Taenia solium post-oncospheral stages in the tissues of infected pigs has been postulated. To assess whether such structures exist and can be detected, we examined muscle samples from cysticercosis-infected and uninfected pigs. Pork samples were homogenized, centrifuged, and resuspended in saline solution. Round microscopic structures of approximately 10 μm with variable refringence were found in the pellets of all samples from both infected and uninfected pigs. These became homogeneously red after staining with Sudan IV and disappeared after ether extraction. The only difference between samples from infected and uninfected pigs was the presence of inflammatory cells and tissue necrosis debris in the former group. Taenia solium oncospheres were stained and observed for comparative purposes, before and after inoculation into pork. Control oncospheres were ellipsoidal, had nucleated basophile cells in their interior, and showed red aggregates on their surfaces when stained with 3% Sudan IV. While rounded microscopical structures similar to those previously reported were found, these differed morphologically from oncospheres, were of a lipid nature, and occurred in both infected and uninfected animals. No evidence supporting the presence of latent post-oncospheral stages of Taenia solium was generated in this series of experiments.
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February 2006
Research Article|
February 01 2006
Can Taenia solium Latent Post-Oncospheral Stages be Found in Muscle Tissue of Cysticercosis-Infected Pigs (Sus scrofa)?
Mary L. Rodrìguez;
Mary L. Rodrìguez
aDepartment of Microbiology, Universidad Peruana Cayetano Heredia, Av. H. Delgado 430, SMP, Lima 31, Lima, Peru, and Cysticercosis Unit, Instituto Especializado en Ciencias Neurológicas, Jr. Ancash 1271, Barrios Altos, Lima 1, Peru;
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Silvia Rodriguez;
Silvia Rodriguez
aDepartment of Microbiology, Universidad Peruana Cayetano Heredia, Av. H. Delgado 430, SMP, Lima 31, Lima, Peru, and Cysticercosis Unit, Instituto Especializado en Ciencias Neurológicas, Jr. Ancash 1271, Barrios Altos, Lima 1, Peru;
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Armando E. Gonzalez;
Armando E. Gonzalez
bSchool of Veterinary Medicine, Universidad Nacional Mayor de San Marcos. Av. Circunvalacion s/n, Salamanca de Monterrico, Ate, Lima 3, Peru. [email protected]
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Manuela Verastegui;
Manuela Verastegui
aDepartment of Microbiology, Universidad Peruana Cayetano Heredia, Av. H. Delgado 430, SMP, Lima 31, Lima, Peru, and Cysticercosis Unit, Instituto Especializado en Ciencias Neurológicas, Jr. Ancash 1271, Barrios Altos, Lima 1, Peru;
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Teresa Bernal;
Teresa Bernal
bSchool of Veterinary Medicine, Universidad Nacional Mayor de San Marcos. Av. Circunvalacion s/n, Salamanca de Monterrico, Ate, Lima 3, Peru. [email protected]
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Juan A. Jimenez;
Juan A. Jimenez
aDepartment of Microbiology, Universidad Peruana Cayetano Heredia, Av. H. Delgado 430, SMP, Lima 31, Lima, Peru, and Cysticercosis Unit, Instituto Especializado en Ciencias Neurológicas, Jr. Ancash 1271, Barrios Altos, Lima 1, Peru;
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Hector H. Garcia
Hector H. Garcia
aDepartment of Microbiology, Universidad Peruana Cayetano Heredia, Av. H. Delgado 430, SMP, Lima 31, Lima, Peru, and Cysticercosis Unit, Instituto Especializado en Ciencias Neurológicas, Jr. Ancash 1271, Barrios Altos, Lima 1, Peru;
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J Parasitol (2006) 92 (1): 199–201.
Citation
Mary L. Rodrìguez, Silvia Rodriguez, Armando E. Gonzalez, Manuela Verastegui, Teresa Bernal, Juan A. Jimenez, Hector H. Garcia; Can Taenia solium Latent Post-Oncospheral Stages be Found in Muscle Tissue of Cysticercosis-Infected Pigs (Sus scrofa)?. J Parasitol 1 February 2006; 92 (1): 199–201. doi: https://doi.org/10.1645/GE-571R1.1
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